Trolley



(No Model.)

v D. L'IPPY, I. E. PNPROGK, G. A. RINBHART 8v D. R. FRANCIS.

l TROLLEY.

Patented July 28, 1896.

Maw

n y (Q MMM UNITED STATES PATENT OFFICE.

DAVID LIPPY, IRA ELMER FINFROCK, GEORGE ATTIGG RINEHART, AND DAVID RAITT FRANCIS, OF MANSFIELD, OHIO.

TROLLEY.

SPECIFICATION forming' part of Letters Patent No. 564,793, dated July 28, 1896. Application 'died September 24, 1895. Serial No. 563,535. (No model.)

To @ZZ whom it may concern..-

Be it known that we, DAvTD LIPPY, IRA EL- MER FINERoox, GEORGE yATTIGG RINEHART, and DAvID RAITT FRANCIS, citizens of the United States, residing 'at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in Trolleys; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon.

The present invention relates to overhead trolleys for electric railways, and has for its object the provision of a more efcient and satisfactory base or support for holding the trolley-wheel against the conductor-wire than has heretofore been devised; and to this end said invention consists in the trolley base or support having the construction and combination of parts substantially as hereinafter speciiied.

In the annexed drawings, Figure l is a perspective view of our invention, and Fig. 2 is a vertical section thereof.

In the carrying of our invention into practice we secure upon the top of the carin any suitable way a bearing-plate A, to the center of which is pivoted a frame that consists of a horizontal base-plate B and two uprights or standards C and C, each of the latter being provided with a foot c, by which it is bolted to the base-plate. To pivot said frame to the plate A, the base-plate B has on its under side a downwardly-projecting pintle b, that passes through an opening in the plate A and is given an extended bearing by means of a projection ct on the under side of the plate A. A pin d, passing through the pintle below the projection ct, securely holds the frame to the bearing-plate, while to prevent the entire under side of the plate B coming in contact with said plate A, whereby considerable friction would result, the base-plate B is provided on its under side, at its center, with a lug or oifset e.

Pivoted between the upper ends of the standards C is a head D, to the upper end of which is secured the trolley mast or pole E. Projecting at a right angle from opposite sides of the head at its top are two arms F and F, through each of which passes a vertical bolt G, that at its lower end supports a block H, which extends at a right angle to the head D and bears at its inner end against the flat side of the same, but without being connected thereto. end of each bolt each block H may be adj usted vertically at will.

To the outer end of each block H there is attached the upper end of a chain I, that at its lower end is connected to the head j of a tube or cylinder J, which incloses and at its lower end engages a coiled spring K, whose By means of a nut g upon the upperupper end is engaged by the head Z of a rod y L, pivoted at its lower end between two lugs m and m on the upper side of the base-plate B. As the two chains are of the same length and as both are connected to the tube J at the same point, it will be seen that normally thespring K will hold the trolley-mast in a vertical position, as seen in full lines in Fig. 2, and whether the mast be swung to one side or the other the tension of the spring will be increased by the tube J being pulled upward and compressing the spring against the rodhead l. Although the tension of the spring will be thus increased, yet, as the chain I, that is pulling upon the tube, is carried toward the pivot of the masthead the eective pressure of the spring upon the latter diminishes as the mast moves toward a horizontal position and is least when such position is reached. As the power exerted by the spring is thus greatest when the mast is at or nearest a vertical position, it will be seen that the keeping of the wheel in contact with high wires is assured, and as the power is diminished when the mast is at a point intermediate the vertical and horizontal, which is usually the case, danger of cutting the wheel from excessive pressure is avoided. The power exerted by the spring when the mast is in a horizontal position being slight, it will be seen that the manipulation of the mast to shift its position is rendered easy, as is also the holding of the same to the cartop when such is necessary. Of course the construction shown admits of an equal or uniform pressure being applied to the mast, whatever its angular position, but the adjustment is preferably such IOO as to produce the effects above noted. By adjusting the blocks H up or down through the medium of the nuts and bolts the tension of the spring may be varied.

The pivotal connection of the lower end of the rod J enables the position of the spring device to change in conformity With the changing position of the mast-head as the latter rocks on its pivot.

Although We prefer the details of construction shown and described, it is to be understood that We do not limit the scope of our invention thereto, as changes in such respect may be made Which will involve no change in principle.

We claim as our invention- 1. The combination of a frame, a pivoted masthead, a coiled spring, a block or blocks connected to said head and with the spring, and means for adjusting said blocks to change the tension of J(he spring, substantially as speciied. j

j 2.1The combination of a pivotedj frame, a head pivotally connected thereto and having arms, a block, and means for connecting the same With the arms by which said block may be adjusted, a rod pivotally connected to the base of the frame, a coil-spring encircling the rod, a cylinder inclosing the spring and rod and attached to the block by suitable flexible connections whereby the tension of the spring may be changed by the adjustment of the block, substantially as and for the purpose set forth.

In testimony that we claim the above We have hereunto subscribed our names in the presence of two Witnesses.

DAVID LIPPY. j IRA ELMER FINFROCK. A GEORGE ATTIGG RINEHART. DAVID RAITT FRANCIS. NVitnesses:

L. J. MGCRAY, T. Y. MCCRAY. 

